Leases - Supplemental Information Related to Operating and Finance Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Leases
Operating cash flows from operating leases	$ 309
Operating cash flows from finance leases	61
Financing cash flows from finance leases	240	$ 335
Leased assets obtained in exchange for new operating lease liabilities	$ 3,060
Weighted-Average Remaining Lease Term (in years):
Operating leases	7 years 2 months 9 days
Finance leases	2 years 8 months 27 days
Weighted-Average Discount Rate:
Operating leases	10.10%
Finance leases	6.94%